38528639840 has 192 divisors, whose sum is σ = 95281401600. Its totient is φ = 14711445504.

The previous prime is 38528639839. The next prime is 38528639861. The reversal of 38528639840 is 4893682583.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62243051 + ... + 62243669.

It is an arithmetic number, because the mean of its divisors is an integer number (496257300).

Almost surely, 2^38528639840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38528639840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47640700800).

38528639840 is an abundant number, since it is smaller than the sum of its proper divisors (56752761760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38528639840 is a wasteful number, since it uses less digits than its factorization.

38528639840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 38528639840 in words is "thirty-eight billion, five hundred twenty-eight million, six hundred thirty-nine thousand, eight hundred forty".